Supplemental Cash Flow Information (Details) - USD ($) $ in Thousands		9 Months Ended
	Apr. 10, 2015	Sep. 27, 2015	Sep. 28, 2014
Equity, Class of Treasury Stock [Line Items]
Interest		$ 1,098	$ 1,395
Income tax payments		4,842	7,478
Capital expenditures accrued		1,500	400
Dividend paid	$ 21,000	20,980	$ 0
Dividend payable, non-cash liability	$ 400
Other current liabilities
Equity, Class of Treasury Stock [Line Items]
Stock repurchase program, amount not settled during period		$ 300